He has an abnormal obsession with firearms.
This article will help to explain it:
http://jpfo.org/filegen-n-z/ragingagainstselfdefense.htm
Miller, born in California, lost his father to cancer when he was a young child. His mother moved to England and then to Ontario.
Judging from his appearance, I would guess that he was quite the target of bullies, fatherless, wimpy looking, etc. He got scholarships to a frou-frou private school in Ontario and then to Harvard, where he got an economics degree. This explains why he does not understand economics.
He got in because the more centrist candidates split the vote (caveat Ron Paul).
An economist, he thinks that cutting the supply will cut the demand. Idiot.
He really has it in for legal gun owners, but, strangely, not for criminal gun owners. He might have an abnormal affinity for the Toronto gang-bangers, who overwhelmingly do not have fathers. He is bullying legal gun owners. This guy has a classic case of reaction formation.
Well, Ontario gun owners are not sitting back on this one. Watch it carefully. If Obama gets in, and the Supreme Court lets you down by saying that reasonable government regulation of firearms is legal, you'll have to do this stuff in The States.